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《Acta Armamentarii》 2018-05
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Research on Distribution Law of Residual Stress in Surface Layer of Cold Roll-beating Spline

CUI Feng-kui;SU Yong-xiang;XIE Ke-ge;DING Ze-han;LI Yu-xi;LI Yan;LI Chun-mei;School of Mechatronics Engineering,Henan University of Science and Technology;Xi'an Modern Control Technology Institute;School of Mechanical and Precision Instrument Engineering,Xi'an University of Technology;  
The involute spline is studied to improve the surface quality of a spline. The contour method is used to determine the spatial distribution of residual stress during cold roll-beating,and the experimental results are analyzed. The effects of cold roll-beating forming parameters on the distribution of residual stresses and the depth distribution of residual compressive stress at the dedendum,the reference circle and the addendum of spline tooth profile formed by cold roll-beating are studied. The result shows that the surface layer of tooth profile during cold roll-beating has residual compressive stress on it,which is the highest when the depth of spline tooth profile at reference circle reaches at 0. 35-0. 45 mm. The residual compressive stress at the dedendum is higher than those at reference circle and addendum,and the residual compressive stress at the addendum is the smallest. The increase in the rotational speed can lead to the increase in the peak value of residual compressive stress and the reduction in the depth of residual compressive stress layer of tooth profile of cold roll-beating spline shaft. The increase in the feed rate can lead to the increase in the peak value of residual compressive stress and the layer depth of a tooth profileof cold roll-beating spline. At reference circle the layer depth of residual compressive stress is 0. 68 ~0. 98 mm,and the stress peak value is 67. 4 ~ 80. 8 MPa.
【Fund】: 国家自然科学基金项目(51475146)
【CateGory Index】: TG669;TH131.4
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